Eunotia obliquestriata
Furey, Lowe and Johansen 2011 Category: Eunotioid
BASIONYM: Eunotia obliquestriata Furey, Lowe and Johansen 2011
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Paula Furey - March 2011
Length Range: 50-54 µm
Width Range: 3.3-3.8 µm
Striae in 10 µm: 13-14 in the center valve, 18-20 at the ends, areolae 40-44
Description
The ventral margin is concave. The dorsal margin is convex and lacks a shoulder. The apices are slightly narrowed and rounded. The helictoglossae are not visible in the LM. The striae are distinctly oblique on the valve mantle and in the valve center, and become radiate near the apices.
Original Description
Basionym: Eunotia obliquestriata
Author: Furey, Lowe and Johansen 2011
Length Range: 50-54 µm
Width Range: 3.3-3.9 µm
Striae in 10 µm: 13-14 in the center valve, 18-20 at the ends, areolae 40-44
Original Description
Valves concave on the ventral margin, convex on the dorsal margin, with no shoulder, 50 – 54 μm long, 3.3 – 3.8 μm wide. Ends slightly narrowed and rounded. Helictoglossae not visible in light microscope. Rimoportula at one valve end. Striae distinctly oblique on valve mantle and in the valve center, 13 –14 in 10 µm, becoming radiate near the apices, 18 – 20 in 10 µm. Areolae 40 – 44 in 10 µm.
Original Images
Cite This Page:
Furey, P. (2011). Eunotia obliquestriata. In Diatoms of the United States. Retrieved May 22, 2013, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_obliquestriata
Species: Eunotia obliquestriata
Contributor: Paula Furey
Reviewer: Rex Lowe
Image Credit: Paula Furey
- Ventral margin concave
- Dorsal margin convex
- Dorsal margin lacking shoulder
- Apices slightly narrowed
- Striae distinctly oblique
The ventral margin is concave, while the dorsal margin is convex and lacks a shoulder, or change in slope. The apices are slightly narrowed and rounded. The striae are distinctly oblique on the valve mantle and in the valve center, and become radiate near the ends.
Compare
Eunotia obliquestriata is similar in morphology to E. valida and E. mydohaimasiae. Eunotia valida lacks the obliquely slanted striae of E. obliquestriata. While E. mydohaimasiae does have obliquely slanted striae, they are not consistently present or are not present across the length of the valves as they are in E. obliquestriata. The apices of E. obliquestriata are only slightly narrowed, and are not set off by a dorsal shoulder as the apices of E. mydohaimasiae and E. valida.
Eunotia mydohaimasiae
Eunotia valida
Hustedt
Citations
Furey, P.C., Lowe, R.L. and Johansen, J.R. (2011). Eunotia Ehrenberg (Bacillariophyta) of the Great Smoky Mountains National Park, USA. Bibliotheca Diatomologica 56: 1-134.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID:
Autecology Discussion
To date, E. obliquestriata has been found epiphytic on bryophytes in a soil seep at a rock outcrop at the bottom of a dry water way along the Long Hungry Ridge Trail off the 20 – Mile Creek Trail in the Great Smoky Mountains National Park.